<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .news {
            font-size: 18px;
            line-height: 1.6;
        }

        @media screen and (max-width: 900px) {
            .news {
                font-size: 16px;
                line-height: 1.4;
            }
        }

        @media screen and (max-width: 600px) {
            .news {
                font-size: 14px;
                line-height: 1.2;
            }
        }
    </style>
</head>

<body>
    <div class="news">
        这是一条新闻。请根据屏幕宽度调整文本样式。
    </div>
</body>

</html>